Physical environment of drumlin formation
Physical environment of drumlin formation
复制标题
鼓林形成的物理环境
DOI：
10.3189/s0022143000017731
复制
发表时间：
1995
影响因子：
3.4
通讯作者：
R. Hooke
中科院分区：
文献类型：
--
作者：
C. J. Patterson;R. Hooke
对已发表的关于冰丘场的描述的回顾表明，以下条件对冰丘的生长是重要的：（1）冰中的纵向压缩应变率和可能延伸的横向应变率，（2）冰川边缘附近的薄冰，以及（3）冰下沉积物中的高孔隙水压力。大多数的鼓林领域显示所有这些，没有领域的良好发展的鼓林被发现，没有。另一方面，形成鼓丘的沉积物的岩性似乎对促进鼓丘的生长并不重要，因为它变化很大，地层的岩性和大尺度地形也不重要。
Abstract Review of published descriptions of drumlin fields suggests that the following conditions are important to drumlin growth: (1) compressive longitudinal and possibly extending transverse strain rates in the ice, (2) thin ice such as occurs near the glacier margin, and (3) high pore-water pressure in the subglacial sediments. Most drumlin fields display all of these, and no fields of well-developed drumlins were found that did not. On the oilier hand, the lithology of drumlin-forming sediment appears not to be important in promoting drumlin growth, since it varied widely, nor are the lithology and large-scale topography of the bed.